Apparatus for pulverizing and classifying ore and the like



Feb. 14, 1933.

F. C. PEREW APPARATUS FOR PULVERIZING- AND CLASSIFYING ORE AND THE LIKE Filed Dec. 51, 1928 3 Sheets-Sheet 1 351;; 7115 6mm? I Feb. 14,1933. c, PEREw 1,897,176

APPARATUS FOR PULVERIZING AND CLASSIFYING ORE AND- THE LIKE Filed Dec. 31, 1928 3 Sheets-Sheet 2 awuemtoz Fhmfi Clerew Feb. 14, 1933. v F. c. PEREW APPARATUS FOR PULVERIZING AND CLASSIFYING ORE AND THE LIKE Filed Dec. '51, 1928 3 Sheets-Sheet 3 awuemcoz JEwmf 61 676 141 951 771' flbtowe/l Patented Feb. 14, 1933 UNITED STATES PATENT OFFICE FRANK C. PEREW, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TO- EDGAR T. WALLACE, 013 LOS ANGELES, CALIFORNIA APPARATUS FOR PULVERIZING AND CLASSIFYING ORE AND THE LIKE Application filed December 31, 1928. Serial No. 329,511.

This invention relates to the comminuting or pulverizing of ore and like materials, and it is an object of the invention to provide an improved method of and apparatus for subjecting the ore or other material to be comminuted simultaneously to a crushing pressure and attrition action to render the material into a pulverulent condition.

It is a further object of the invention to provide an improved method of and apparatus for rendering ore and like materials to a comminuted or pulverized condition and classify the pulverized material.

The invention furthermore relates to apparatus of this character embodying a pair of opposed crushing members, one of which comprises a muller including a head carrying an annular crushing member or shoe, said muller being supported to have gyratory movement to progressively move successive portions of the shoe toward and away from the other crushing member in the form of an annular die, and it is a further object of the invention to provide improved means for mounting the shoe carrying head of the muller to hold the same against rotation while permitting of gyratory and axial movement thereof and yieldingly urged with a predetermined crushing pressure in a direction toward the die.

It is another object of the invention to provide pulverizing apparatus of this character embodying a gyratory muller wherein the die is rotated in a direction reverse to the gymtory movement of the shoe carrying head of the muller whereby the material as it is subjected to the crushing force of the muller is simultaneously subjected to an attrition or rubbing action to triturate and render the ma terial to a pulverulent condition.

Another object of the invention is to provide in apparatus of this character means wherein the ore is rendered pulverulent in the presence of a liquid and the lighter or nonmetallic and more buoyant content of the ore is floated off, and means is provided in which to collect the heavier or metallic content of the ore and said means adapted to carry material therein to form an amalgam with such collected metallic content of the pulverized ore.

Other objects and advantages willhereinafter appear.

In the drawings accompanying and forming partof this application there is illustrated an embodiment of apparatus for carrying out the improved method of rendering ore and like materials to a pulverulent condition and classifying the pulverized ma-- terial wherein Figure 1 is a longitudinal sectional view.

Figure 2 is a side elevation looking at the right of Figure 1. 7

Figure 3 is a perspective view of a head forming a part of the muller member.

Figure 4 is a perspective view of an annular shoe carried by the muller head and comprising one of the crushing members.

Figure 5 is a perspective view of the annu- 7 0. lar die or crushing member with which the muller shoe co-operates to effect a crushing and triturating of the ore.

Figure 6 is a perspective view of one end of a shaft upon which the muller head is mounted and carried to show the arrangement of the shaft to mount the same concentrically of the die and hold it against rota-. tion while permitting of gyratory movement of the shaft.

Figure 7 is a perspective view of means for mounting the muller head carrying shaft ec centrically to the axis ofthe die and the operative means for effecting gyratory movement of the shaft, the parts being shown in 35 dissembled relation; and A Figure 8 is a fragmentary plan View of a support in which a carrier for the die, and comprising the bottom of the pan, is rotatably mounted and in which the one end of the 991 muller head carrying shaft is mounted concentrically of the die.

In the embodiment of the apparatus illustrated in the drawings for carrying out the method of subjecting ore and like material to a crushing force and attrition action to render the same pulverulent and the classi fying of the pulverulent material, there is provided a circular supporting or base member B upon which the operative mechanism and supporting structure therefor of the apparatus is mounted, and. whereby the same is supported upon a foundation F of suitable material, in the present instance concrete.

This base member is arranged at the periph- 'eral portion with; concentrically arranged flanges 9- to extend-from one face and consti tuting the top of the base toform a trough, for a purpose to be hereinafter described, having an outletpipegor jp'ipes lO connected to and leading from the bottom thereof; The" base member is also arranged centrallythereof with a hollow pillar' or pedestal 11 extending laterally or upwardlyfromtherbase the direction of the trough forming flanges ,9, said pillar having an opening-in the top and opening through the bottom of the base member.

annular-pan in which'the ore or other 205 material is to be pulverizedis rotatably carried by the' 'base member B, said pan com.- prisjng'an annular-head 12 to constitute the bott om of-'the pan, with a cylinder'or drum 13tdc'o1is'titute theside wall of the pan en- 2 gagedupon said head to extend aboutan annular flange projected" from the top or face of the head, as at 14;, and secured thereto by a draw band or hoop 15. The; inner wall of the pan comprises a cylinder =16 of greater length tha'n the cylinder l3 seated in aj recess in the surface ofthe inner wall of the opening throughthe head, as-at 17%Thepan head is arranged on-the bottom surface with an an-' nular rib 18' wherebyit is rotatably support-r edupon the 'bas'e'member Bbetween a pair of annular'flanges or ribs 19, thespacebetween the flangesfis-preferably slidablygreater than the width of the ribthereby providing a lubricant carrying pocket'betw'een said'rib and one-of theflan'g'e's, as at 20. While this rib is shown as having a slip surface connection with the basememberit will be obvio'us that 'ananti friction bearing-' may be provided-- betweenthe .pan'and basemember by interposing rollers orthe like betwen the pan rib 18andthe basemember, The pan head 18 constructed and arranged whereby the pe-' ripheral portion 'will extend beyond and overlap the inner trough forming flange 9. 507 The pan is rotated byra bevel pinion 21 fixed to a shaft 22 journaledinbearings below the base member, a peripheral portion of 7 said opinion beirigextended into a recess 22 in I the base member and meshing with gear teeth 23 onthe lower surface of the pan head;

Oneof the material crushing and triturat-i ing members, herein termed adie, is carried by and rotatable with said pan;v and comprises an: annular memberl24, said die belng mounted upon the pan head and positioned therein-'withthe peripheral wallengaging a n lshoulder 25, and have a recess 26 in the upper surface" of arcuat ef'f'orm in, cross section and constituting the crushing'sur'faceof said die. The other material crushing and "t'r'ituratsubstantially with the crushing surface of the die. The mullerhead28 has a hub'29 extended centrally inward fromthe end'oppo- "site to theshoewherebythe head is mounted ;o a sh ft 30 to ext nd over-and abo t nor wall 'l6' of the'panf The' muller head is mounted :on the shaft to permit of longitudinalmovement thereof relative to the shaft and held against rotation'on the-shaft by keying the muller head to-the shaft, in the p present instance shown as comprising diametricallyopposite ribsorkeysfil on the shaft adapted-to engage'in correspondingly formed keywaysin-the hub 29, themuller head being held against-longitudinal movement on the shaft inone direction by'nut's'32- on a threaded portion of the'shaft above and'against which thei'hub of them-ullerhead abuts.

The shaft 30 is inounted.;concentrically-eccentrically ofthe axis of the'pan and diemember 24 wherebysthe shaft with the shoe carrying head iis 'adapted to l have gyrator'y movement .to progressively: move successive portions ofthe shoe towarcland away from the die and ride upon and off from the material interposed-between the shoe and die To effect this gyratory movement of the shaft and-permit of'movement'thereof in an axial direction the lower end'of the shaft is slight v 1y -enlarged andmade .of hexagonal form in cross isection an'd' the hexagonal surface shaped to arcuate form in:longitudinal sec tion, as clearly shownlat 33 in Figures 1' :and- 6.=--'At:the inner end vofsaid hexagonal por-r:

tion-ithe shaft is arranged: with an annular enlargement '34 (Figure 6). having the sur face :adjacent the hexagonal end arranged in a plane to extend at a' right angle to the axis of:the shaft and the oppositeisurface ofaspherical .or arcuateform. The shaft is:

extendedv throu-gh the opening in the top of the pillar 11 with the-hexagonal end-ofthe shaft mounted.concentrically of the 'die" a a bearing 35 thebore ;of which is of hexagonal .1 shape in cross sectioni'and the cross sectional, areau of, which bore is equal to the greatest cross cs c on lgar a ofth he g nal p r io of the shaft The bearing 35. isqfixedly;

mounted in a bearing box in the form ofa on member 36 mounted, in the pillarl lfto have, axial, sliding movement and held against To;

tation feather keys, diametrically oppo i elyd sp d 55 1 1 e ag ng in 'key'w y 1 the 'bearingbo'x and pillar 11,asf shown at37 in Figure I. 'To retain thefshaft in the hear ing hexane permit efiaterai movement er the shaft as it is gyrated a perforatecap 38fis engaged upon:the ='shaft-above the annular enlargement 34 having an arcuate surface to conform to and engage the arcuate surface of the shaft enlargement and secured to the bearing box by tie bolts 39. The shaft is uprights 44 fixed to lugs 45 extended laterally from the base member B and by means of which lugs the base member is secured to the foundation F by tie rods extended through perforations in said lugs and embedded in the concrete of the foundation. (Figures 2 and 8). The gear is supported in the plate bearing 42 by a shoulder formed at the juncture of the hub with the gear seat ing against the top of the plate bearing and a ring 46 fixed to the lower end of said plate bearing. The shaft is flexibly connected with the gear eccentrically to the axis thereof to participate in the rotative movement of the gear to nnpart gyratory movement to the shaft and muller head by a bearing member 47 in which the shaft is loosely engaged and the bearing member connected with the gear by a diaphragm 48 of suitable material, such as leather preferably of multiple ply. To secure the bearing member to the gear the gear is arranged on the face opposite to that from which the hub extends with a pair of ribs 49 of angle shape in cross section, (Figure 7), said ribs extending in parallel relation at diametrically opposite sides of the opening through the gear with the one angle portion spaced from the gear and projecting laterally and having a series of elongated perforations therein, as shown at 50. The bearing member 47 is loosely engaged in the central opening in the diaphragm with a flange 51 on the bearing in abutting relation to the diaphragm, said flange having a portion of a width substantially equal to the space between the gear ribs 49 and elongated at right angles to said portion, the diaphragm being secured to said flange by clamping plates 52 engaged at the opposite side of the diaphragm in opposed relation to the elongated portions of the flange of the bearing member and riveted thereto, as shown at 53. The bearing menr' ber 47 with the diaphragm is then secured to the gear ribs 49 by engaging the opposite perforated marginal portions of the diaphragm extended beyond the flange of the bearing member upon the perforated portions of the gear ribs and secured thereto by perforated clamping bars 54 engaged upon said perforated marginal portions of the diaphragm and below the perforated angle portion of the gear ribs and secured thereto by bolts passed through the perforations in said clamping bars, the gear ribs and diaphragm. It will be obvious that by the elongating of the perforations in the gear ribs that the bearing member may be adjusted to vary the eccentric movement of the bearing member and thereby of the muller shaft relative to the axis of the gear and to the concentric mounting of said shaft.

The gear 41 is rotated and thereby the muller gyrated in a direction reverse to the rotation of the die carrying pan by a pinion 56 (Figure 2) fixed to the shaft 57 and meshing with'the gear 41. The gear 41 and the die carrying pan are actuated from a suitable source of power by a belt passed around a pulley 58 fixed to the pinion carrying shaft 57, a pulley 59 juxtaposedto the pulley 58 being loosely mounted on the shaft to which the belt may shift to render the apparatus inactive. The shaft 57 is operatively connected with the shaft 22 carrying the pinion 21 meshing with the gear teeth of the pan by a sprocket chain 60 passing around a sprocket wheel 61 on shaft 57 and a sprocket wheel 62 fixed to an intermediate shaft 63, and the latter shaft connected with the shaft 22 carrying pinion 21 by a sprocket chain 64 passing around a sprocket wheel 65 on shaft 63 and a sprocket wheel 66 on shaft 22. The ratio of the gearing is such that the muller shoe is gyrated at a greater speed than the rotation of the pan and die. By this arrangement as the muller shoe rides upon and off the material between the shoe and die, due to the gyratory movement of the shoe the material will not only be subjected to a crushing pressure but also to an attrition or rubbing action by the slippage of the die,

relative to the shoe and thereby also triturate the material and more readily render it into a pulverulent condition.

The crushing member or shoe 27 is made of wear resisting material, such as manganese steel or the like, and while it may be constructed integral with the muller head 28, it is preferably made as a separate member and releasably secured to the muller head, whereby the head may be made of a cheap material, such as ordinary grey iron casting. To secure the shoeto the mullerhead thehead is arranged at the end with a laterally extending annular flange having slots circumferentially disposed about the same and extended radially inward from the periphery, as at 28. The shoe 27 at the side opposite to the crushing face is arranged with an annular rib having inverted T-slots extended radially inward from the peripheral Wall, as at 27, said slots being circumferentially disposed about the shoe rib and spaced to correspond with the spacing of the slots 28 in the flange of the muller head. Headed bolts are entered into v with said metalliccontentlk the'I slots otthe shoewitlrthethreaded ends-1: .i Tdprerent wear, bi thepancylinders13fl6:

extended through the sltsintheinullter head I andhaving-nuts threadedthereon at :the 'upper 'sideof the flange-ofthermullerhead, as 115i 346E155 in'Figi'ireli. F The material-to be treated.- is'delivered to theupan by'suitableq-means, such as a chute 67, which may lead from the outlet ojfiahop-' per (not shown) orlfrom proportionalfeed ing meansto which the material is delivered 'froma hopperw T 1 A The apparatus, isfalso to} classify andfa, consequent frequent renewal thereof, a

wear resisting surface. is providedjfor said; cylinders, comprisingsheet metal bands73, H J arranged in contiguous relation tosaid cylindersadj acent the bottomof the pan.

pan with the muller may be enclosed in r a suitable housing, shown as consisting of admin 7 6;mounted upon "and extending upward from theba'se; member B and-a plate 77 75,

. secured upon said vdrum having a; central thepulveri'zed ore for which purpose the ore,

'- is renderedfpulveru-lent in a liquid; such as water. The. Water: is supplied inc afconstant stream to the-pan from. a suitableisource by,

a a flexible conduit .68,c0 nn'ected m a circular,

ipe.6 9 extended aboutthe top and carried y themuller headiQ S', pipes 70 beingcon-f 9 nected, to saidipipe 69 and, extended through openings in and arranged Y within the. muller head With-the outlets above and adjacent to the inuller shoe '27." Byfthis'arrangement as. 1 *thepan is filledfwith;water the adniission or,

flowv ofwater fromthe, outlet pipes into the pan sets up an upward flowingcurrentof the 7 water in the pan, which upward fi'owzis further augmented by the gyratoryniovement of the muller shoe. The ore as it is pulver- 0. ized mixes with the water fori'niii'g a pulp and this, induced l'upwardlyfiowing current of i I water will floatthe pulp, causing the spilling ofithe same from tl e-panjinthe overflow of the: water therefrom, this overflowof lithe i pulp from the pan-being tothe trough formed byxtheflangesfi of the base member B from which it is drained by the pipes 10, the material inthe trough, being directed; to the outlet. pipes by paddles fixed l to the'por-vi Q. tion ofthepan overhi i' lgingtheinnerstrough forming flange 9, said paddles exltending into 1 the tlfOllghifll'ld. being rotatablewith the-pan.

I ThedieQt is'i'of less width then thepan. and is retained in position in'thegpan, relative i '4 to the muller shoe byspaced nembers 71, 72

of suitable material, sueh as wood, interposed between the die andflanges 01" the pan head 12,, saidfispaoing members being -afrranged with recesses inthe top to forin channels result that themetallicVcontentwill.gravitate to the bottom, of-the pan and thefmore buoyy c ant or lighter I and non-metallic. content; will readily mix with thewater to form 'apul and-the force of the fiow iof water into the? i pan maybe so regulated thatlthemore'buoy f antand lighter particlesare floated ofifroni, the pan and the heavier:- metjallicl content bearing.

tween the crushing members. gravitates {to the bottom and. collects? in the; 7 channels inethe spacing members, and said channelsmay carry a suitable material there in, sueh asfl'i'nercuryyto' form an aii algair v opening for thepas'sagefof the 'muller head.- Q 1 ;0 lubricate the operative parts an annu;

l extend about; :the bearing of 1 the gear hub therein,- a. pipe-1Z3 connected with a source;

oflubri'cating supply being connected to said chamber." The surplus lubricant Will-.drip

frommthe gear bearing and be, collected 85, an annular recess in the top of the hub -off theinuller head; a duct 8l leading frornsaid recess to the bore of the hub'and thebearing of the shaft 30*tl16f6ii1, the lubricant flowing fremsaidbearing to the bearing 330i the shaft in the bearing 36." If desired, the latter bearing of theshaft may be packed with grease notonly. assuring the lubricant a of; said bearing members but also obviating 7 the necessity otrirequent lubricant of said'95:

' Means are provided to indicate the quantityof material confinedbetween the crushing member's, comprising agaugeinember TQsecured-in'the upper end of the shaft 30-1 and extended"througl an open ng n an" extension of the bearing member 47, saidvrgauge r '71 n V r V I I ,ineinoer zbeing 1 moved :by. the longitudinal movement ,offg-the muller-g shaft relative; to a PQlIflIGTBORCljUSlZELblYFlIlOllHtQd on said ea;

tension of the bear'in'glt'fl 1;;-

' I v a It, will bejjobvio'us that various: modifications may be ma deiii:construction and an' rangemeiit of parts,fand that portions ofthe invention my be used without others, and

come.withinthe iscopeoffthe inve'ntionQQ Playing thus described my invention 'I' claim: I -1. lngcornininutingapparatus, a pair of superposedannularycrushing membersone 1 supported-I from they other, and j-aetua-ting meansthereforoperat ve-to 'gyrate one'meni berl and 1 progressively move successive 011;

tions 'ofsaidmemberinto and out of engage T ine'iit with I the; other niember and simultaneo'uslyrotatethe"otherlin'ernber in 'a direct ioni opp-o'sitestozithe g'yratory movement ofe'the'; gyratoi yiineinber to v siinultaneous'ly exert crashing and attrition forces on material-be 2, In comminuting apparatus, a pairioifi superposedcrushing members one Of;Wl1lCl1l membersis arranged with an annularcrush f ing tacefand "rotatable inja horizontal; plane andi th'e iotheriineinber havingv ani'aniiular crushing face opposed to the crushing face of and supported by the rotatable member and gyratory in a direction opposite to the direction of rotation of the rotatable memher, and means to gyrate the gyratory member to progressively move successive portions of the gyratory member toward and away from the rotary member during the rotation of the latter and exert a crushing force on material between the crushing faces of the members and rotate the rotary member to simultaneously exert an attrition force on such material.

8. In comminuting apparatus an annular die rotatable in a horizontal plane, a head arranged with an annular shoe, means to support said head concentrically-eccentrically of and to have movement toward and away from the die with the shoe in opposed relation to the die, means to rotate the die in one direction and gyrate the head with the shoe in a direction opposite to the rotation of the die, and means to yieldingly urge the gyra tory crushing member in a direction toward the rotary crushing member.

at. In comminuting apparatus, a rotary annular crushing member, a second annular crushing member located above the first crushing member, a pair of bearing members arranged concentric of the first crushing member, the second crushing member being concentrically mounted in one of said bearing members and eccentrically mounted in the other bearing member, and means to rotate the eccentric bearing to impartgyratory movement to the second crushing member in one direction and rotate the first crushing member in the opposite direction.

5. In comminuting and classifying apparatus for ore and the like, a rotatable pan, a die mounted in and rotatable with the pan, an annular shoe located above the die in the pan, a pair of bearing members arranged coaxially of the pan and die, a shaft mounted concentrically in one of the bearing members and eccentrically in the other bearing member, means to mount the shoe upon the shaft, and means to rotate the pan with the die in one direction and the eccentric bearing member in the opposite direction to gyrate the shaft and shoe carried thereby in a direction opposite to the rotation of the die with the pan.

6. In comminuting and classifying apparatus as claimed in claim 5, means for supplying liquid to the pan to effect an upward current of liquid with comminuted material in the pan and overflow thereof from the pan.

7. Comminuting and classifying apparatus as claimed in claim 5, wherein the shoe carrying shaft is eccentrically mounted in the one bearing member by a diaphragm to effect gyratory movement of the shaft with the shoe through the rotation of said bearing member.

8. Comminuting and classifying apparatus as claimed in claim 5, wherein the pan is of annular form, a fixed support in which the pan is rotatably mounted, said support having a pillar extending axially through the pan and in which the concentric bearing member for the shoe carrying shaft is mounted.

9. In comminuting and classifying apparatus as claimed in claim 5, a fixed support in which the pan is rotatably mounted and in which the concentric bearing member for the shoe carrying shaft is mounted to have axial movement, and a spring confined between said bearing member and a fixed part of the support to yieldingly urge the shaft with the shoe axially in a direction toward the die.

10. In comminuting and classifying apparatus as claimed in claim5, a fixed support in which the pan and concentric bearing member for the shoe carrying shaft is mounted, said support being arranged with an annular trough extended about and to receive the overflow from the pan and having outlet means.

11. Comminuting and classifying apparatus as claimed in claim 5, wherein the pan is arranged with channels in a plane below the die to receive the metallic contents of the comminuted ore and adapted to carry a material to form an amalgam with said metalllC contents.

12. In comminuting apparatus, an annular crushing member supported for rotation in a horizontal plane, an annular crushing member arranged above and supported by a portion thereof from the rotary member to have gyratory movement relative to said rotary member, means to gyrate the gyratory member about the axis of the rotary member toprogressively move successive portions of said member out of and into engagement with the rotary member and simultaneously rotate the rotary member in a direction opposite to the direction of the movement of the gyratory member to simultaneously exert crushing and attrition forces on material between the crushing members.

13 In comminuting apparatus, an annular crushing member rotatable in a horizontalplane and having a crushing face of concave form in cross section in the upper face, an annular gyratory crushing member superposed to the rotatable crushing member having a crushing face of convex form in cross sec-' tion opposed to the concave crushing face of the rotatable member and gyratory in a direction opposite to the direction of rotation of the rotatable member, and means to simultaneously rotate the one member and gyrate the other member.

14:. In comminuting apparatus, a pair of superposed crushing members, one of which members has an annular crushing face and rotatable in a horizontal plane and the other member having an annularccrushing faceop ,fi

'- posed to and supported by' the crushing'face of the rotatable member, means to mount in 7 said latter member concentrically-eccentrL i i 'cally of the rotary member, andlmeans toro- Y tate the eccentric mounting of said latter 56 l m m member to gyrate said member about its.c0n-

centric mounting and progressively move I I successive portions of the crushing face 9 thereof into and out .of engagement with successive portionsof the crushing "face of the rotatable member and rotate the-rotary j member in the opposite direction and ata V the gyratory movement of lower speed than the other member.

ratus,;a pan rotatable in la horizontal'plane arranged with anannular crushing member L of-a wi'dthi lessythan the width of the, pan and withthe crushing face above the bottom 7 i of the pan ;and having achannel concentric J of and contiguous to the crushing member i and belowthe crushing face ther f a crush. I

ing memberhaving an annular crushing face superposed to the crushing face of the crushing member'inthe pan and mounted rconcenp trica11y eccentrica11yof the pan-,and means 3" i torotate the pan with the crushing member carried thereby in one direction-and'gyrate t .the other crushingjmember inthe opposite direction.

Signed at Los An geles, in county "of -V Los'Angeles and-Stateof'Galifornia, this 18th day of December, 1928. E

- FRANK o, PEREW. 

